Berossus () or Berosus (; Ancient Greek: Βηρωσσός, romanized: Bērōssos; possibly derived from Late Babylonian Akkadian: 𒁹𒀭𒂗𒉺𒇻𒋙𒉡, romanized: Bēl-reʾû-šunu, lit. 'Bel is his shepherd') was an early-3rd-century BCE Hellenistic-era Babylonian writer, priest of Bel Marduk, and astronomer who wrote in the Koine Greek language.
His original works, including the Babyloniaca (Ancient Greek: Βαβυλωνιακά), are lost, but fragments survive in some quotations, largely in the writings of the fourth-century CE early Christian writer Eusebius.
Berossus has recently been identified with Bēl-reʾû-šunu, a high priest of the Esagila Temple in the city of Babylon, as mentioned in a document from 258 BCE.
HistoryLayer draws the world as it was in any year from 123,000 BCE to
2026. Move the slider and the borders redraw for that year; the map
carries 23,890 events, 12,790 people, 837 wars and 13,183 cities, each
one readable in place. Signing in is optional and lets you keep what
you find.